This is a 26 minute clip from a one-hour radio interview in which Franklin Lopez (The Stimulator) and Denis Rancourt (Activist Teacher) discuss activism, direct action, diversity of tactics, and the heart of the Black Bloc.
In the first part of the clip Lopez gives a detailed account of how Black Bloc violence occurred at G20-Toronto - he was there and followed it all with his camera.
Lopez rejects the conspiracy theory of progressives wherein the cops let the Black Bloc do its thing, used the Black Bloc, abandoned decoy car for them, etc. He has a quite different account supported by video evidence.
Then the two exchange about the mindfuck that prevents progressives from seeing direct action as the effective tool that it is, as the essential component for change without which all is just a master smoke screen of guilt eliviation.